813866814 has 24 divisors (see below), whose sum is σ = 1766306880. Its totient is φ = 270838368.

The previous prime is 813866813. The next prime is 813866831. The reversal of 813866814 is 418668318.

It is a happy number.

813866814 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 813866814.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (813866813) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 26319 + ... + 48170.

It is an arithmetic number, because the mean of its divisors is an integer number (73596120).

Almost surely, 2^813866814 is an apocalyptic number.

813866814 is an abundant number, since it is smaller than the sum of its proper divisors (952440066).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

813866814 is a wasteful number, since it uses less digits than its factorization.

813866814 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75104 (or 75101 counting only the distinct ones).

The product of its digits is 221184, while the sum is 45.

The square root of 813866814 is about 28528.3510564491. The cubic root of 813866814 is about 933.6507420715.

The spelling of 813866814 in words is "eight hundred thirteen million, eight hundred sixty-six thousand, eight hundred fourteen".